NinjaAnswer

X-int is when y = 0

0 = -2x - 3

3 = -2x

x = -3/2

y - int is when x = 0

y = -3

(x-int)x = -3/2 and (y - int)y = -3

55. What is the median and mode?

Reorginize them:

20, 32, 32, 45, 45, 45, 48, 50, 55, 70

In the middle we find 45 and 45. Since there is two numbers we take the average. (45 + 45)/2 is 45.

The median is 45

The mode is the number that occurs the most. If you look, 45 is the only number that appear the most, 3 times.

The mode is 45.

x = 5/2

x = 2.5

2/11m + 16 = 4 + 6/11m

12 = 4/11m

m = 33

Well lets see:

6+ 4/5b = 9/10b

6 = 1/10b

b = 60

Sorry but you are incorrect. Where did u go wrong??

From My other post

Well lets see:

6+ 4/5b = 9/10b

6 = 1/10b

b = 60

Sorry but you are incorrect. Where did u go wrong??

Thanks CPhill!!! Tiring.....!!!

3/4n - 18 = 1/4n - 4

1/2n = 14

n = 28

-3 = -7/8 + b<--------Add 7/8 to both side

-17/8 = b

b = -17/8 OR -2.125

Substitution:

Change second equation to point slope:

y=-3x-13

9x-2y=27<---Second Eq.

2y = 9x - 27

y = (9x - 27)/2

y=-3x - 13

Since they both equal y, you can set them equal to each other.

(9x - 27)/2 = -3x - 13 -------------Multiply both sides by 2

9x - 27 = -6x - 26

15x = 1

x = 1/15

Now plug this into either of the equations to get y. I will do the first one

y = -3x - 13 ---------Plug in 1/15 for x

y = -3/15 -13

y = -1/5 - 13

y = -13 1/5

y = -66/5 OR -13.2

x = 1/15 OR 0.06666666666666666666666666666666666666666666666666666667

Elimination Method-->

Set first equation to standard form. 

y = -3x - 13<--------First Equation

9x - 2y = 27

y = -3x - 13

y + 3x = -13<-------------Standard form

-2y + 9x = 27<------------Flipped x and y on the left side. Doesn't change the original equation

Now multiply the top equation by 2

2(y + 3x) = 2 * -13

2y + 6x = -26

-2y + 9x = 27

Now add both equations. This eliminates y so now you can solve for x.

2y + 6x -2y + 9x = -26 + 27

15x = 1

x = 1/15

Now you just do the stuff we did for substitution and solve for y.

y = -3x - 13 ---------Plug in 1/15 for x

y = -3/15 -13

y = -1/5 - 13

y = -13 1/5

y = -66/5 OR -13.2<-----------------------------------------------------------------------------------------Answer for y

x = 1/15 OR 0.06666666666666666666666666666666666666666666666666666667<-----Answer for x